RIOT Timer

[Schmutzpuppe]

Hi,

 

does anybody have good documentation/demo source about the RIOT?

I am especially interested in the timer function.

[EricBall]

http://www.6502.org/documents/datasheets/m...s_6532_riot.pdf

 

Note: there is a "quirk" with the RIOT timer on the 7800. Because the RIOT clock line is slaved to the 6502, which is controlled by MARIA, it gets impacted by the "downshift" the CPU makes when it accesses the TIA and RIOT.

[Schmutzpuppe]

Thanks for the link!